Improved guide for scroll-saws



UNITED STATES PATENT OFFICEo GEORGE NIDERKORN AND JOHN DUBERNET, OF NEW YORK, N. Y.

IMPROVED GUIDE FOR SCROLL-SAWS.

Specification forming part of Letters Patent No. 39,164, dated July 7, 1863.

To all whom it'may concern.-

Be it known that we, GEORGE NIDERKORN and JOHN DUBERNET, both ofthe city, county, and State of New York, have invented a new and useful Improvementin Scroll-Saws 5 and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l represents a front elevation of our invention. Fig. 2 is a transverse vertical section of the same. Fig. 3 is a detached horizontal section of our improved guide.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to 'an improvement in that class of scrollsaws in which the sawblade forms an endless band stretched over two pulleys, to which a rapid rotary motion is imparted by steam or other suitable power.

A represents the saw-blade, which is made of thin steel, or of any other suitable material, and the ends of which are united by bracing or other suitable means, in such a manner that the saw forms an endless band. This endless band is stretched overtwo pulleys, B B', which run on axles C C', that have their bearings on a frame, D, one above and the other below the table E. The axle of the lower pulley, B', has rigid bearings on the cross-bars a,

and pulleys or a crank attached to this axle serve to impart motion to the saw. The bearings of the axle C of the upper pulley, B, are on a sliding carriage, which can be adjusted up or down by a hand-screw, b, and by these means the tension of the saw can be regulated.

The saw-blade must necessarily be very thin, and it is, therefore, of the utmost importance to have a good, reliable, and adjustable guide to keep the blade in the proper position as it enters the work to be cut, and to prevent it from getting twisted or forced oft' from the pulleys B B. 1n order to accomplish this purpose, we have secured to the frame D on the side ofthe saw, a rod, c, which is square and adjustable up and down on brackets d, that are firmly fastened to the frame. To the lower end of this rod a box, e, is attached by means of a screw, f, and this box contains and forms the bearing for the adjustable guide g. This guide consists of aslotted piece of steel, or other suitable material, and it is adjustable in the box e by a set screw, t', so that it can be shifted up and down to suit the work to be cut, and also adjusted in a horizontal direction to make up for wear, or to accommodate itself to different blades. A similar guide Amust be arranged below the table E, as indicated in red outlines in Fig. 2, and by this arrangement the saw will always be kept in the proper position, it will be prevented from being twisted, or from running off the pulleys, and it can be used with the greatest advantage for cutting wood of various thickness.

What we claim as new, and desire to secure by Letters Patent, is

The arrangement of the horizontallyadinstable slotted guide gin the box e, attached to the vertically-adjustable square rod c, in combination with the endless band-saw A, constructed and operating in the manner and for the purpose herein shown and described.

G. NIDERKORN. J. DUBERNET.

Witnesses:

W. HAUFF, J. F. BUCKLEY. 

